cover 1876 (9 Oct.) entire to Bordeaux, marked "p. R.M.S. Pkt", bearing 4d. grey (2) and 6d. clearly tied by double-arc datestamps, showing red crayon "1/1½", London Paid (30.10) and Calais entry c.d.s. with, on reverse, French T.P.O. and arrival c.d.s. Photo
cover 1876 (9 Oct.) entire to Bordeaux, marked "p. R.M.S. Pkt", bearing 4d. grey (2) and 6d. clearly tied by double-arc datestamps, showing red crayon "1/1½", London Paid (30.10) and Calais entry c.d.s. with, on reverse, French T.P.O. and arrival c.d.s. Photo

Details
cover 1876 (9 Oct.) entire to Bordeaux, marked "p. R.M.S. Pkt", bearing 4d. grey (2) and 6d. clearly tied by double-arc datestamps, showing red crayon "1/1½", London Paid (30.10) and Calais entry c.d.s. with, on reverse, French T.P.O. and arrival c.d.s. Photo
Further details
Note: This cover was overfanked ½d. The rate to France was 1/0½d. and the inland rate 1d. As there were as yet no ½d. or 2d. stamps, this franking was the most economical